You use External Editing preferences to specify the file format and other options for editing camera raw and DNG files in Photoshop Elements and external image-editing applications that cannot read the mosaic sensor data in camera raw files. The options that you specify in External Editing preferences are also used by Photoshop when you save camera raw and DNG files from Lightroom Classic CC in Photoshop. Finally, you also use External Editing preferences to select external image-editing applications.

Set preferences for working with
camera raw files in external editors

Lightroom Classic CC opens camera raw and DNG files directly
in Photoshop CS3 (10.0.1) or later. However, Lightroom Classic CC
must send either TIFF or PSD copies of camera raw and DNG files
to Photoshop Elements and to other external editors that cannot
read raw data. In the External Editing preferences, you specify
the file format, color space, bit depth, and compression for the
TIFF and PSD files that Lightroom Classic CC sends to these editors. To best
preserve color details in photos sent from Lightroom Classic CC, 16-bit ProPhoto
RGB is recommended. If you open camera raw files from Lightroom Classic CC
directly into Photoshop and save them there, Photoshop uses the
settings you specify in Lightroom Classic CC External Editing preferences for
the files that it saves.

In the External Editing preferences dialog box,
choose options from the following menus:

Saves photos with a bit depth of 8 bits or 16 bits per
color channel (red, green, and blue). Files that are 8 bit are smaller
and more compatible with various applications, but do not preserve
the fine tonal detail of 16-bit files.

Compression

(TIFF only) Applies either ZIP compression or no compression
to photos. ZIP is a lossless compression method that is most effective
for images that contain large areas of single color.

Choose an external editor

You can designate an application to be used
as an external editor in the External Editing preferences dialog
box. After you choose an application, you can always use Preferences
to change to a different application.

In the External Editing preferences, click Choose
in the Additional External Editor area.

Navigate to and select the application to use, and then
click Open (Windows) or Choose (Mac OS).

Примечание.

You can also select an external editor by choosing
Photo > Edit In Other Application from the Library or
Develop module. You’ll be prompted to navigate to and select the
application to use. After you choose an external editor, the name
of the application appears as Edit In [Name of Application] in the
Photo menu.

Create an external editor preset

You can create presets for external editors
in the External Editing preferences dialog box. External editor
presets allow you to specify multiple applications as external editors
and create different photo-handling options for multiple uses with
one or more external editors.